There is also a rule called "More for Less!". All plant and zombie cards cost 1 less at the end of each turn.

Due to the "More for Less!" rule being in effect, almost any deck can be used efficiently if not just quicker. That being said, using Solar and Kabloom Heroes could prove very useful due to Kabloom's damaging tricks and Solar's strike-through plants being able to be played earlier in the match, giving you a better advantage against Brainstorm's fast growing army.